TWI674463B - Display device - Google Patents

Abstract

The first substrate and the second substrate of the display device have a plurality of sub-pixels, and the sub-pixels include a first electrode, a second electrode, and a third electrode. The first electrode is disposed on the first substrate, and the first electrode is a block electrode. The second electrode is located above the first electrode. The second electrode includes a first trunk and a first branch. One end of the first branch is connected to a side of the first trunk, and the extending direction of the first trunk is connected to the first branch. The extension directions are staggered. The third electrode is disposed on the second substrate. The third electrode includes a second trunk and a second branch. One end of the second branch is connected to a side of the second trunk, and the extending direction of the second trunk and the extending direction of the second branch are connected. Staggered, and in the direction of perpendicular projection to the first substrate, any one of the second branches is located between two adjacent first branches.

Description

Display device

The present invention relates to a display device, and more particularly, to a display device including three electrodes.

In recent years, people's demand for display devices has increased accordingly, and research on display quality of display devices has also progressed. In order to pursue excellent display quality, both the response time of liquid crystal and the efficiency of liquid crystal are factors in the design of the display device. However, the above two factors are difficult to balance, so it is still urgent to develop a combination of fast and high response time of liquid crystal. Liquid crystal efficiency display device.

This disclosure relates to a display device, which can better control the deflection of the liquid crystal, not only can maintain the fast response time of the liquid crystal, but also improve the liquid crystal efficiency.

A display device according to the present disclosure. The display device includes a first substrate and a second substrate. The second substrate is disposed corresponding to the first substrate to accommodate a display medium layer. The first substrate and the second substrate have a plurality of sub-pixels, and at least one of the sub-pixels includes a first electrode, a second electrode, at least one insulating layer, a third electrode, and at least one switching element. The first electrode is disposed on the first substrate, and the first electrode is a block electrode. The second electrode is located on the first electrode. The second electrode includes a first trunk and a plurality of first branches. One end of each first branch is connected to one side of the first trunk and one of the first trunks extends. The direction intersects with the direction in which each of the first branches extends. The insulating layer is disposed between the first electrode and the second electrode. The third electrode is disposed on the second substrate. The third electrode includes a second trunk and a plurality of second branches. One end of each second branch is connected to one side of the second trunk and one of the second trunks extends. The direction is staggered with an extension direction of each of the second branches, and any one of the second branches is located between two adjacent first branches in a direction perpendicular to the direction of the first substrate. The switching element is disposed on the first substrate, and the switching element is electrically connected to one of the first electrode and the second electrode to serve as a pixel electrode, and the other of the first electrode and the second electrode serves as a common electrode. .

In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are described in detail below in conjunction with the accompanying drawings:

In the drawings, the thicknesses of layers, films, panels, regions, etc. are exaggerated for clarity. Throughout the description, the same reference numerals denote the same elements. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to a physical and / or electrical connection. Furthermore, "electrically connected" or "coupled" means that there are other elements between the two elements.

As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within an acceptable deviation range of a particular value determined by one of ordinary skill in the art, taking into account the measurements in question and A specific number of measurement-related errors (for example, limitations of the measurement system and / or process system). For example, "about" may mean within one or more standard deviations of the stated value, or within ± 30%, ± 20%, ± 10%, ± 5%. Furthermore, "about", "approximately" or "substantially" as used herein may select a more acceptable range of deviations or standard deviations based on optical properties, etching properties, or other properties, and all properties can be applied without one standard deviation .

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted to have meanings consistent with their meanings in the context of the related art and the present invention, and will not be interpreted as idealized or excessive Formal meaning unless explicitly defined as such in this article.

Exemplary embodiments are described herein with reference to cross-sectional views that are schematic views of idealized embodiments. Accordingly, variations in the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Therefore, the embodiments described herein should not be construed as limited to the particular shape of the area as shown herein, but include shape deviations caused by, for example, manufacturing. For example, a region shown or described as flat may generally have rough and / or non-linear characteristics. Furthermore, the acute angles shown may be round. Thus, the regions shown in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the scope of patenting.

FIG. 1A illustrates a top view of a display device 10 according to an embodiment of the disclosure. Fig. 1B shows a cross-sectional view of the A-A 'line in Fig. 1A. Please refer to FIGS. 1A and 1B simultaneously. The display device 10 includes a first substrate 110 and a second substrate 115. The second substrate 115 is disposed opposite the first substrate 110 to receive a display medium layer 160. The display medium layer 160 includes, for example, a liquid crystal material (not limited to this), and has a plurality of liquid crystal molecules filled in an accommodation space between the first substrate 110 and the second substrate 115. In the embodiment of the present invention, the first substrate 110 and the second substrate 115 have at least one sub-pixel PX as an example, but it is not limited thereto. In some embodiments, the first substrate 110 and the second substrate 115 may have multiple sub-pixels PX. In the embodiment of the present invention, the color of the sub-pixel PX includes, for example, red, green, blue, yellow, white, or other suitable color sub-pixels.

At least one of the sub-pixels PX may include a first electrode 130, an insulating layer 140, a second electrode 150, a third electrode 190, and a switching element T. In this embodiment, the first electrode 130, the insulating layer 140, and the second electrode 150 may be formed on the first substrate 110. The third electrode 190 may be formed on the second substrate 115, and then the first substrate 110 and the second substrate 115 are grouped, and then the display medium layer 160 is accommodated between the first substrate 110 and the second substrate 115, but is not limited thereto. The display device 10 may further include at least one of a color conversion layer 180 and a cover layer 170. For example, the color conversion layer 180 and the cover layer 170 may be disposed on the second substrate 115, and the color conversion layer 180 is provided between the cover layer 170 and the second substrate 115, but is not limited thereto. In other embodiments, the color conversion layer 180 may be disposed on the first substrate 110 and may be selectively disposed between the first substrate 110 and the second electrode 150; or may be disposed on the first substrate 110 and the first electrode 130; or, is disposed between the first electrode 130 and the second electrode 150. Similarly, the cover layer 170 may be selectively present on the second substrate 115 or the first substrate 110. The color conversion layer 180 may be a single layer or a multi-layer material, and the material includes a color color resist, a quantum dot (rod), a fluorescent material, or other suitable materials. At least one of the cover layer 170 and the insulating layer 140 may be a single-layer or multi-layer material, and the material includes inorganic materials (for example, silicon oxide, silicon nitride, silicon oxynitride, or other suitable materials), organic materials (for example, : Photoresist, polyimide, benzocyclobutene (BCB), polypropylene, or other suitable materials), or other suitable materials.

The first electrode 130 may be disposed on the first substrate 110, and the first electrode 130 may be a block electrode, that is, the first electrode 130 may not have branches and trunks, but may be disposed on the entire surface of the sub-picture of the first substrate 110. Prime PX. In one embodiment, at least one of the first electrode 130, the second electrode 150, and the third electrode 190 may be formed of a transparent or translucent conductive material. Preferably, the first electrode 130, the second electrode 150, and the third electrode 190 are all made of a transparent or translucent conductive material. The transparent conductive material may include indium tin oxide, indium gallium zinc oxide, indium zinc oxide, indium gallium oxide, nano carbon tube (rod), organic conductive material, metal or alloy less than about 60 angstroms, or other suitable Material, or a combination of at least one of the foregoing materials.

The second electrode 150 may be located on the first electrode 130, and an insulating layer 140 may be disposed between the first electrode 130 and the second electrode 150. In this embodiment, the second electrode 130 may include a first trunk 152, a plurality of first branches 154, and a plurality of third branches 156. One end 154a of the first branch 154 may be connected to one side 152a of the first trunk 152, and one end 156a of the third branch 156 may be connected to the other side 152b of the first trunk 152. The extension direction of the first trunk 152 may be interlaced with the extension direction of the first branch 154 and the extension direction of the third branch 156, for example, the extension direction of the first trunk 152 may be substantially parallel to the extension direction of the Y-axis. . The extension direction of the first branch 154 and the extension direction of the third branch 156 may be substantially parallel to the extension direction of the X axis, respectively. The first branch 154 may extend away from the connection with the side 152a of the first trunk 152 and away from the first trunk 152, and the third branch 156 may move away from the connection with the other side 152b of the first trunk 152 The extension direction of the first trunk 152, the extension direction of the first branch 154 and the extension direction of the third branch 156 may be different from each other, that is, opposite directions, for example, the extension direction of the first branch 154 may be marked as + X, and the third The extension direction of the branch 156 may be marked as -X.

For example, the width of the first branch 154 may decrease in the direction in which the first branch 154 extends, and the width of the third branch 156 may decrease in the direction in which the third branch 156 extends. Viewed from another aspect, the first branch 154 may have a maximum width W ₁₁ where it is connected to the first trunk 152 and a minimum width W ₁₂ where it is farthest from the first trunk 152. The third branch 156 may have a maximum width W ₁₁ ′ where it is connected to the first trunk 152 and a minimum width W ₁₂ ′ where it is farthest from the first trunk 152. The maximum width W _{11 of the} first branch 154 may be substantially equal to the maximum width W ₁₁ ′ of the third branch 156, but is not limited thereto. The minimum width W _{12 of the} first branch 154 may be substantially equal to the minimum width W ₁₂ ′ of the third branch 156, but is not limited thereto. In some embodiments, the first branch 154 and the third branch 156 may be a polygon (eg, trapezoidal, but not limited to this) in a direction perpendicular to the first substrate 110 (eg, the Z-axis direction). In addition, part of the first trunk 152, the first branch 154, and the third branch 156 may form a polygon together (for example, a flat octagon with a middle edge).

The third electrode 190 may be disposed on the second substrate 115 and may have, for example, a mesh or lattice structure. In this embodiment, the third electrode 190 may include a second trunk 192, a third trunk 196, a plurality of second branches 194, and a plurality of fourth branches 198. One end 194 a of each second branch 194 may be connected to one side 192 a of the second trunk 192. One end 198 a of each fourth branch 198 may be connected to one side 196 a of the third trunk 196. The other end 198b of the fourth branch 198 may correspond to and be connected to the other end 194b of the second branch 194 to form a connection point 199. In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the connection point 199 is a first trunk 152 partially overlapping the second electrode 150. That is, in a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the first trunk 152 is located between the second trunk 192 and the third trunk 196, and the extending direction of the first trunk 152 may be connected through Office 199. The extension directions of the second trunk 192 and the third trunk 196 may be interleaved with the extension directions of the second branch 194 and the fourth branch 198, respectively. For example, the extension directions of the second trunk 192 and the third trunk 196 may be substantially parallel to each other The extension direction of the Y axis. The extending directions of the second branch 194 and the fourth branch 198 may be substantially parallel to the extending direction of the X axis, respectively. The second branch 194 may extend from a connection point with the side 192 a of the second trunk 192 toward a direction close to the third trunk 196. The fourth branch 198 may extend from a connection point with the side 196 a of the third trunk 196 toward a direction close to the second trunk 192. The extension directions of the second branch 194 and the fourth branch 198 may be different from each other, that is, they may be opposite directions. For example, the extension direction of the second branch 194 may be marked as -X and the extension direction of the fourth branch 198 may be marked as + X.

For example, the width of the second branch 194 may decrease in the direction in which the second branch 194 extends, and the width of the fourth branch 198 may decrease in the direction in which the fourth branch 198 extends. Viewed from another aspect, the second branch 194 may have a maximum width W ₁₃ where it is connected to the second trunk 192 and a minimum width W ₁₄ where it is farthest from the second trunk 192. The fourth branch 198 may have a maximum width W ₁₃ ′ where it is connected to the third trunk 196 and a minimum width W ₁₄ ′ where it is farthest from the third trunk 196. The maximum width W _{13 of the} second branch 194 may be substantially equal to the maximum width W ₁₃ ′ of the fourth branch 198, but is not limited thereto. The minimum width W _{14 of the} second branch 194 may be substantially equal to the minimum width W ₁₄ ′ of the fourth branch 198, and may also be substantially equal to the width of the connection point 199, but is not limited thereto. In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the second branch 194 and the fourth branch 198 may be a polygon (eg, trapezoidal, but not limited to this), and the second branch 194 and The fourth branches 198 may form a polygon (for example, a concave hexagon). Viewed from another aspect, in a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), two adjacent second branches 194 correspond to two adjacent fourth branches 198 and pass through part of the first The two trunks 192 are connected to part of the third trunk 196 to form an opening O. In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the opening O may be a polygon (for example, a hexagon) to accommodate one of the first trunk 152, the first branch 154, and One of the third branches 156 (it can be regarded as accommodating a similar polygon (for example, an octagon).

In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), any one of the second branches 194 may be located between two adjacent first branches 154. In this embodiment, in a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the second branch 194 and the first branch 154 are staggered from each other and do not overlap each other, but are not limited to this. In other embodiments, in the direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the two most adjacent second branches 194 and the first branch 154 may partially overlap.

In this embodiment, the side S _{154 of the} first branch 154 has a side slope m ₁₅₄ , the side S _{194 of the} second branch ₁₉₄ has a side slope m ₁₉₄ , and the side S _{156 of the} third branch ₁₅₆ has One side slope m ₁₅₆ , and the side S _{198 of the} fourth branch ₁₉₈ has one side slope m ₁₉₈ . Branching ratio of the second side 194 of the side slope S ₁₉₄ m to the side edge ₁₉₄ of the first branch 154 most adjacent to the side edges ₁₅₄ slope S of ₁₅₄ m (for example: m ₁₉₄ / m ₁₅₄₎ may be about -4 ~ 4 (unitless), preferably about -1 ~ 1. The ratio of the fourth branch 198 S side ₁₉₈ side ₁₉₈ to the side edge of the slope m of the most adjacent to the third branch 156 of the side ₁₅₆ of the slope m S ₁₅₆ (e.g.: m ₁₉₈ / m ₁₅₆₎ may be about -4 ~ 4 (unitless), preferably about -1 ~ 1, such a design can not only have good liquid crystal reaction time, but also have excellent liquid crystal efficiency.

In this embodiment, the distance between two adjacent first branches 154 may be substantially the same, and the distance between each adjacent two second branches 194 may be substantially the same. The interval between two adjacent fourth branches 198 may be substantially the same. Preferably, the distance between two adjacent first branches 154, the distance between two adjacent second branches 194, the distance between two adjacent third branches 156, and the distance between two adjacent fourth branches 198 The pitches can all be substantially the same. However, the disclosure is not limited to this. In other embodiments, the distance between two adjacent first branches 154 may be different, the distance between two adjacent second branches 194 may be different, and the two adjacent third branches The spacing between 156 may be different, and the spacing between two adjacent fourth branches 198 may be different. At least one of the distance between two adjacent first branches 154, the distance between two adjacent second branches 194, the distance between two adjacent third branches 156, and the distance between two adjacent fourth branches 198. The person can be different. The width W ₁₄ of the other end 194b of the second branch 194 of the third electrode 190 in the direction perpendicular to the first substrate 110 (for example, the Z-axis direction) is the width D between two adjacent second branches 194 The percentage ratio of ₁₉₄ (for example: (W ₁₄ / D ₁₉₄ ) * 100%) and / or the width W ₁₄ ′ of the other end 198 b of the fourth branch 198 of the third electrode 190 is between two adjacent fourth branches 198 The ratio of the width D ₁₉₈ (for example: W ₁₄ '/ D ₁₉₈ ) * 100%) may be about 11% ~ 67% (no unit), preferably about 11% ~ 44%. Such a design is not only possible It has good liquid crystal reaction time and excellent liquid crystal efficiency. D between a width ₁₉₄ adjacent two of the second branch 194 may be a sum of the distance between the two second branch 194 and second branch 194 and the width W at the second connector 192 of the stem ₁₃ adjacent to, or relative The sum of the distance between the two adjacent second branches 194 and the respective half widths (for example, the ½ width W ₁₃ of the adjacent two) at the junction of the adjacent two second branches 194 and the second trunk 192. Similarly, two adjacent fourth branch width D between the width W of 198 ₁₉₈ may be the distance between the adjacent two fourth branches 198 and 198 of the fourth branch of the stem 196 of the third connector ₁₃ ' The sum, or the distance between the adjacent two fourth branches 198 and the respective half of the width of the connection between the adjacent two fourth branches 198 and the third trunk 196 (for example, the 1/2 width W ₁₃ of the adjacent two) ')Sum.

Each of the first branch 154, the second branch 194, the third branch 156, and the fourth branch 198 may have a length L ₁₅₄ , L ₁₉₄ , L ₁₅₆ and L ₁₉₈ . The length L _{154 of the} first branch 154 may be substantially equal to the length L _{156 of the} third branch 156, and the length L 194 of the second branch ₁₉₄ may be substantially equal to the length L _{198 of the} fourth branch ₁₉₈ . Length of the first length L ₁₉₄ L _{154 154} branch length and a third branch 156 of the L ₁₅₆ may be less than the second branch 194, respectively, and the fourth branch 198 L _198.

The switching element T may be disposed on the first substrate 110 and electrically connected to one of the first electrode 130 and the second electrode 150 as a pixel electrode, and the other of the first electrode 130 and the second electrode 150 as A common electrode. In this embodiment, if the second electrode 150 is electrically connected to the switching element T as an example, the second electrode 150 is used as a pixel electrode, and the first electrode 130 is used as a common electrode. For example, the source S of the switching element T is electrically connected to the corresponding data line 120, the drain D of the switching element T is electrically connected to the second electrode 150, and the gate G of the switching element T is electrically connected to the scan. Signal. In some embodiments, if the first electrode 130 is electrically connected to the switching element T, the first electrode 130 is used as a pixel electrode, and the second electrode 150 is used as a common electrode. For example, the source S of the switching element T is electrically connected to the corresponding data line 120, the drain D of the switching element T is electrically connected to the first electrode 130, and the gate G of the switching element T is electrically connected to the scan Signal. The switching element T may be plural, but is not limited thereto. In some embodiments, the third electrode 190 may be a controllable potential, such as a common potential, a floating potential, or other suitable potentials. Preferably, the third electrode 190 is a common potential and may be A voltage difference is formed between the electrode 130 or the second electrode 150.

Each sub-pixel PX of the display device 10 may correspond to at least one data line 120 disposed on the first substrate 110, that is, a plurality of sub-pixels PX may correspond to multiple data lines 120 disposed on the first substrate 110, respectively. . The extending direction of each data line 120 may be substantially the same as the extending direction of the first trunk 152, the second trunk 192, and the third trunk 196, such as the Y direction, but is not limited thereto. In other embodiments, the extending direction of the data line 120 may be substantially along the X direction. In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), a part of the third electrode 190 (for example, a part of the second trunk 192 or the third trunk 196) may overlap the corresponding data line 120, and a part The third electrode 190 (for example, part of the second branch 194 and the fourth branch 198) may not overlap with the corresponding data line 120, but may correspond to between two adjacent data lines 120, that is, the third electrode 190 may One part overlaps the corresponding sub-pixel PX, and the other part is disposed on the corresponding data line 120 and / or on the area covered by the corresponding black matrix (not labeled).

FIG. 2 illustrates a top view of a display device 20 according to another embodiment of the present disclosure, and a cross-sectional view of the A-A 'line in FIG. 2 is similar to FIG. 1B and reference can be made to FIG. 1B. It must be noted here that, in this another embodiment, the component numbers and parts of the components of the foregoing embodiment are used. The same or similar symbols are used to indicate the same or similar components, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and details are not described herein. This embodiment is different from the display device 10 of FIG. 1 in that the appearances of the second electrode 250 and the third electrode 290 are different, and reference may be made to the following description.

Referring to FIG. 2, the display device 20 includes a first electrode 230, a second electrode 250 and a third electrode 290. The second electrode 250 is located on the first electrode 230 and the third electrode 290 is located on the second electrode 250. The first electrode 230 may be a block electrode (refer to the description of the foregoing embodiment). The second electrode 250 and the third electrode 290 may be patterned electrodes, respectively, and have branched structures. The second electrode 250 may include only a first trunk 252 and a plurality of first branches 254. One end 254a of the first branch 254 may be connected to one side 252a of the first trunk 252. The extension direction of the first trunk 252 and the extension direction of the first branch 254 may be interlaced. For example, the extension direction of the first trunk 252 may be substantially parallel to the extension direction of the Y-axis. The extending direction of the first branch 254 may be substantially parallel to the extending direction of the X-axis. The first branch 254 may extend from a connection point with a side 252 a of the first trunk 252 in a direction away from the first trunk 252. The width of the first branch 254 may decrease toward the extending direction of the first branch 254. Viewed from another aspect, the first branch 254 may have a maximum width W ₂₁ where it is connected to the first trunk 252 and a minimum width W ₂₂ where it is farthest from the first trunk 152. In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the first branch 254 may be a polygon (for example, a trapezoid, but not limited to this).

The third electrode 290 may include only a second trunk 292 and a plurality of second branches 294. One end 294a of the second branch 294 may be connected to one side 292a of the second trunk 292. The extension direction of the second trunk 292 and the extension direction of the second branch 294 may be intersected with each other. For example, the extension direction of the second trunk 292 may be substantially parallel to the extension direction of the Y-axis. The extending direction of the second branch 294 may be substantially parallel to the extending direction of the X-axis. The second branch 294 may extend from the connection point with the side 292a of the second trunk 292 in a direction away from the second trunk 292 (that is, in a direction close to the first trunk 252). The width of the second branch 294 may decrease in the direction in which the second branch 294 extends. Viewed from another aspect, the second branch 294 may have a maximum width W ₂₃ where it is connected to the second trunk 292 and a minimum width W ₂₄ where it is farthest from the first trunk 292. In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the second branch 294 may be a polygon (for example, a trapezoid, but not limited to this). The extension directions of the second branch 294 and the first branch 254 may be different from each other, that is, they may be opposite directions. For example, the extension direction of the second branch 294 may be marked as -X, and the extension direction of the first branch 254 may be marked as + X.

Any one of the second branches 294 may be located between two adjacent first branches 254 in a direction perpendicular to the first substrate 110 (for example, the Z-axis direction). In this embodiment, in a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the second branch 294 and the first branch 254 are staggered from each other and do not overlap each other. However, this disclosure Not limited to this, in other embodiments, in a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), two adjacent second branches 294 and the first branch 254 may partially overlap each other.

In this embodiment, the side S _{254 of the} first branch 254 has a side slope m ₂₅₄ , and the side S _{294 of the} second branch ₂₉₄ has a side slope m ₂₉₄ . Branching ratio of the second side edge 294 of the side slope S of ₂₉₄ m to the side edge ₂₉₄ of the first branch 254 most adjacent to the side edges ₂₅₄ slope S of ₂₅₄ m (for example: m ₂₉₄ / m ₂₅₄₎ may be about -4 ~ 4, preferably about -1 ~ 1, such a design can not only have good liquid crystal reaction time, but also have excellent liquid crystal efficiency.

In this embodiment, the interval between each two adjacent first branches 254 may be substantially the same, and the interval between each two adjacent second branches 294 may be substantially the same. Preferably, the distance between two adjacent first branches 254 and the distance between two adjacent second branches 294 may be substantially the same. However, the disclosure is not limited thereto. In other embodiments, the interval between each two adjacent first branches 254 may be different, and the interval between each two adjacent second branches 294 may be different. In some embodiments, the distance between two adjacent first branches 254 and the distance between two adjacent second branches 294 may be different. The width W _{22 ′} of the other end 294 b of the second branch 294 of the third electrode 290 in the direction perpendicular to the first substrate 110 (for example, the Z-axis direction) is the width between two adjacent second branches 294 The percentage ratio of D ₂₉₄ (for example: (W _{22 '} / D ₂₉₄ ) * 100%) can be about 11% ~ 67% (no unit), preferably 11% ~ 44%. Such a design can not only have good The liquid crystal reaction time can also have excellent liquid crystal efficiency. Two adjacent second branch between the width D 294 ₂₉₄ 294 as the sum of the distance between the two second branch and a second branch 294 and the width W at the second connection ₂₃ of the stem 292 adjacent, or adjacent The sum of the distance between the two second branches 294 and the respective half widths (for example, the ½ width W ₂₃ of the adjacent two) at the junctions of the two adjacent second branches 294 and the second trunk 292.

Each of the first branch 254 and the second branch 294 may have a length L ₂₅₄ and L _{294 in} a direction perpendicular to the first substrate 110 (for example, the Z-axis direction). The length L _{254 of the} first branch 254 may be substantially equal to the length L _{294 of the} second branch ₂₉₄ . The length L _{254 of the} first branch 254 may be larger than the gap length L ₂₉₄ ′ of the side 252 a of the first trunk 252 and the second branch 294. The length ratio of the length L _{254 of the} first branch 254 to the gap length L ₂₉₄ 'of the side 252a of the first trunk 252 and the second branch 294 (for example: (L ₂₅₄ / L ₂₉₄ ') * 100%) may be about 0. % ~ 24%. Such a design can not only have good liquid crystal response time, but also have relatively good liquid crystal efficiency. If the length L _{254 of the} first branch 254 to the gap length L ₂₉₄ 'of the side 252a of the first trunk 252 and the gap length L ₂₉₄ ' of the second branch 294 (for example: (L ₂₅₄ / L ₂₉₄ ') * 100%) may be about 0%, which means that the gap length L ₂₉₄ ′ of the side 252 a of the first trunk 252 and the second branch 294 is about 0 μm, and can still have a good liquid crystal reaction time, and also have a relatively good liquid crystal efficiency.

The switching element T may be disposed on the first substrate 110 and electrically connected to one of the first electrode 230 and the second electrode 250 as a pixel electrode, and the other of the first electrode 230 and the second electrode 250 as A common electrode. In this embodiment, if the second electrode 250 is electrically connected to the switching element T as an example, the second electrode 250 is used as a pixel electrode, and the first electrode 230 is used as a common electrode. For example, the source S of the switching element T is electrically connected to the corresponding data line 120, the drain D of the switching element T is electrically connected to the second electrode 250, and the gate G of the switching element T is electrically connected to the scan Signal. In some embodiments, if the first electrode 230 is electrically connected to the switching element T, the first electrode 230 is used as a pixel electrode, and the second electrode 250 is used as a common electrode. For example, the source S of the switching element T is electrically connected to the corresponding data line 120, the drain D of the switching element T is electrically connected to the first electrode 230, and the gate G of the switching element T is electrically connected to the scan Signal. The switching element T may be plural, but is not limited thereto. In some embodiments, the third electrode 290 may be a controllable potential, such as a common potential, a floating potential, or other suitable potentials. Preferably, the third electrode 290 is a common potential and may be A voltage difference is formed between the electrode 230 or the second electrode 250.

In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), a part of the second electrode 250 (for example, a part of the first trunk 252) and / or a third electrode 290 (for example, a part of the second trunk) 292) may overlap the corresponding data line 120, and a portion of the third electrode 290 (for example, a portion of the second branch 294) may not overlap the corresponding data line 120, but may correspond to between two adjacent data lines 120, and That is, the third electrode 290 is partially overlapped with the corresponding sub-pixel PX, and the other part is disposed on the corresponding data line 120 and / or on the area covered by the corresponding black matrix (not labeled).

FIG. 3 is a top view of a display device 30 according to another embodiment of the present disclosure, and a cross-sectional view of the A-A 'line in FIG. 3 is similar to FIG. 1B and reference can be made to FIG. 1B. It must be noted that, in this further embodiment, the component numbers and parts of the foregoing embodiments are used. The same or similar symbols are used to indicate the same or similar components, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and details are not described herein. This embodiment is different from the display device 10 of FIG. 1 in that the appearances of the second electrode 350 and the third electrode 390 are different, and reference may be made to the following description.

Referring to FIG. 3, the display device 30 includes a first electrode 330, a second electrode 350 and a third electrode 390. The second electrode 350 may be located on the first electrode 330 and the third electrode 390 may be located on the second electrode 350. The first electrode 330 may be a block electrode (refer to the description of the foregoing embodiment). The second electrode 350 and the third electrode 390 may be patterned electrodes, respectively, and have branched structures. The second electrode 350 may include a first trunk 352, a third trunk 356, a plurality of first branches 354, and a plurality of third branches 358. One end 354a of the first branch 354 may be connected to one side 352a of the first trunk 352. One end 358a of the third branch 358 may be connected to one side 356a of the third trunk 356. The other end 354b of the first branch 354 may correspond to and be connected to the other end 358b of the third branch 358 to form a connection point 299. The extending direction of the first trunk 352 and the third trunk 356 may be interlaced with the extending direction of the first branch 354 and the third branch 358. For example, the first trunk 352 and the third trunk 356 may be interlaced. The extending direction may be substantially parallel to the extending direction of the Y-axis. The extending direction of the first branch 354 and the third branch 358 may be substantially parallel to the extending direction of the X axis. The first branch 354 may extend from a connection point with a side 352 a of the first trunk 352 in a direction away from the first trunk 352. The third branch 358 may extend away from the third trunk 356 at a connection point with the side 356 a of the third trunk 356. The extension direction of the first branch 354 and the third branch 358 may be different from each other, that is, they may be opposite directions. For example, the extension direction of the first branch 354 may be marked as -X, and the extension direction of the third branch 358 may be marked as + X.

The width of the first branch 354 may decrease in the direction in which the first branch 354 extends, and the width of the third branch 358 may decrease in the direction in which the third branch 358 extends. Viewed from another aspect, the first branch 354 may have a maximum width W ₃₁ where it is connected to the first trunk 352 and a minimum width W ₃₂ where it is farthest from the first trunk 352. The third branch 358 connected to the third trunk 356 may have a maximum width W ₃₁ ′ and a minimum width W ₃₂ ′ at the place farthest from the third trunk 356. The maximum width W _{31 of the} first branch 354 may be substantially equal to the maximum width W ₃₁ ′ of the third branch 358. The minimum width W _{32 of the} first branch 354 may be substantially equal to the minimum width W ₃₂ ′ of the third branch 358. In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the first branch 354 and the third branch 358 may be a polygon (eg, trapezoidal, but not limited to this). The three branches 356 may form a polygon (for example, a concave hexagon).

The third electrode 390 may include a second trunk 392, a fourth trunk 396, a plurality of second branches 394, and a plurality of fourth branches 398. One end 394a of the second branch 394 may be connected to one side 392a of the second trunk 392. One end 398a of the fourth branch 398 may be connected to one side 396a of the fourth trunk 396. The other end 398b of the fourth branch 398 may correspond to and be connected to the other end 394b of the second branch 394 to form a connection point 399. The extension direction of the first trunk 352 and the extension direction of the third trunk 356 may not pass through the connection point 399. The extension direction of the first branch 354 may be substantially the same as the extension direction of the second branch 394, and the extension direction of the third branch 358 may be substantially the same as the extension direction of the fourth branch 398. In some embodiments, the first trunk 352 and the third trunk 356 are located between the second trunk 392 and the fourth trunk 396 in a direction perpendicular to the first substrate 110 (for example, the Z-axis direction). The trunk 352 partially overlaps the second branch 394, and the third trunk 356 partially overlaps the fourth branch 398. The extension directions of the first trunk 352, the second trunk 392, the third trunk 356, and the fourth trunk 396 may be intersected with the extension directions of the first branch 354, the second branch 394, the third branch 358, and the fourth branch 398, respectively ( interlaced), for example, the extending directions of the first trunk 352, the second trunk 392, the third trunk 356, and the fourth trunk 396 may be substantially parallel to the extending direction of the Y axis, respectively. The extending directions of the first branch 354, the second branch 394, the third branch 358, and the fourth branch 398 may be substantially parallel to the extending direction of the X axis, respectively.

The width of the second branch 394 may increase toward the extending direction of the second branch 394, and the width of the fourth branch 398 may increase toward the extending direction of the fourth branch 398. Viewed from another aspect, the second branch 394 may have a minimum width W ₃₃ where it is connected to the second trunk 392 and a maximum width W ₃₄ where it is farthest from the second trunk 392. The fourth branch 398 is connected to the fourth stem 396 may have a minimum width W ₃₃ ', away from most of the fourth stem 396 has a maximum width W _34'. In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the second branch 394 and the fourth branch 398 may be a polygon (eg, trapezoid, but not limited to this), and the second branch 394 and The fourth branch 398 may form a polygon (for example, a convex hexagon in the middle). Viewed from another aspect, in a direction perpendicular to the first substrate 110 (for example, in the Z-axis direction), two adjacent second branches 394 correspond to two adjacent fourth branches 398 and pass through a portion of the first The two trunks 392 are connected to part of the fourth trunk 396 to form an opening O. In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the opening O may be a polygon (for example, a concave hexagon) to accommodate a portion of the first trunk 352 and the first branch 354. One of the one, part of the third trunk 356, and one of the third branches 358 (can be regarded as accommodating a similar polygon (for example, a concave hexagon).

In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), any one of the second branches 394 may be located between two adjacent first branches 354. In this embodiment, in a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the second branch 394 and the first branch 354 are staggered from each other and do not overlap each other, but are not limited to this. In other embodiments, in the direction perpendicular to the first substrate 110 (for example, the Z-axis direction), the two most adjacent second branches 394 and the first branch 354 may partially overlap each other.

In this embodiment, the side S _{354 of the} first branch 354 has a side slope m ₃₅₄ , the side S _{194 of the} second branch 394 has a side slope m ₁₉₄ , and the side S _{358 of the} third branch ₃₅₈ has One side slope m ₃₅₈ , and the side S _{398 of the} fourth branch ₃₉₈ has one side slope m ₃₉₈ . Ratio of the second side edge 394 of the side branch S of the slope ₃₉₄ m to the side edge ₃₉₄ of the first branch 354 most adjacent to the side edges ₃₅₄ slope S of ₃₅₄ m (for example: m ₃₉₄ / m ₃₅₄₎ may be about -4 ~ 4 (unitless), preferably about -1 ~ 1. The fourth side 398 side branch S of the slope ₃₉₈ m to the side edge ₃₉₈ of the third branch 358 most adjacent to the side edges ₃₅₈ slope S ratio of ₃₅₈ m (for example: ₃₉₈ m / ₃₅₈ m) can be about -4 ~ 4 (unitless), preferably about -1 ~ 1, such a design can not only have good liquid crystal reaction time, but also have excellent liquid crystal efficiency.

In this embodiment, the distance between two adjacent first branches 354 may be substantially the same, the distance between two adjacent second branches 394 may be substantially the same, and the distance between two adjacent third branches 358 The pitch may be substantially the same, and the pitch between two adjacent fourth branches 398 may be substantially the same. Preferably, the distance between two adjacent first branches 354, the distance between two adjacent second branches 394, the distance between two adjacent third branches 358, and the distance between two adjacent fourth branches 398 The pitches can all be substantially the same. However, this disclosure is not limited to this. In other embodiments, the distance between two adjacent first branches 354 may be different, the distance between two adjacent second branches 394 may be different, and the two adjacent third branches The spacing between 358 may be different, and the spacing between two adjacent fourth branches 398 may be different. At least one of the distance between two adjacent first branches 354, the distance between two adjacent second branches 394, the distance between two adjacent third branches 358, and the distance between two adjacent fourth branches 398. The person can be different. The width W ₃₄ of the other end 394b of the second branch 394 of the third electrode 390 in the direction perpendicular to the first substrate 110 (for example, the Z-axis direction) is the width D between two adjacent second branches 394 The percentage ratio of ₃₉₄ (for example: (W ₃₄ / D ₃₉₄ ) * 100%) and / or the width W ₃₄ ′ of the other end 398 b of the fourth branch 398 of the third electrode 190 is between two adjacent fourth branches 398 The percentage ratio of the width D ₃₉₈ (for example: (W ₃₄ '/ D ₃₉₈ ) * 100%) can be about 11% ~ 67% (no unit), preferably about 11% ~ 44%. Such a design Not only can it have a good liquid crystal reaction time, it can also have excellent liquid crystal efficiency. Two adjacent second branch 394 of width D between the pitch ₃₉₄ between the two second branch 394 and second branch 394 the sum of the width W of the trunk 392 at the second connection ₃₃ of the adjacent, or adjacent The sum of the distance between the two second branches 394 and the respective half widths (for example, the ½ width W ₃₃ of the adjacent two) at the junctions of the two adjacent second branches 394 and the second trunk 392. Two adjacent fourth branch width D between a width W of 398 ₃₉₈ spacing 398 between the two fourth branches and a fourth connector 398 and the fourth branch of the trunk 396 at the sum of ₃₃ 'adjacent to, or relative The sum of the distance between the adjacent two fourth branches 398 and the respective half widths (for example, the 1/2 width W ₃₃ ′ of the adjacent two) of the junctions between the adjacent two fourth branches 398 and the fourth trunk 396.

Each of the first branch 354, the second branch 394, the third branch 358, and the fourth branch 398 has a length L ₃₅₄ , L ₃₉₄ , L ₃₅₈ and L ₃₉₈ . The length L _{354 of the} first branch 354 may be substantially equal to the length L _{358 of the} third branch 358, and the length L 394 of the second branch ₃₉₄ may be substantially equal to the length L _{398 of the} fourth branch ₃₉₈ . A first branch and a length L _{354 354} 358 L length of the third branch ₃₅₈ may be less than the length of the second branch and the fourth branch 398 L ₃₉₄ 394 L ₃₉₈ length, respectively.

The switching element T may be disposed on the first substrate 110 and electrically connected to one of the first electrode 330 and the second electrode 350 as a pixel electrode, and the other of the first electrode 330 and the second electrode 350 as a pixel electrode. A common electrode. In this embodiment, if the second electrode 350 is electrically connected to the switching element T as an example, the second electrode 350 is used as a pixel electrode, and the first electrode 330 is used as a common electrode. For example, the source S of the switching element T is electrically connected to the corresponding data line 120, the drain D of the switching element T is electrically connected to the second electrode 350, and the gate G of the switching element T is electrically connected to the scan. Signal. In some embodiments, if the first electrode 330 is electrically connected to the switching element T, the first electrode 330 is used as a pixel electrode, and the second electrode 350 is used as a common electrode. For example, the source S of the switching element T is electrically connected to the corresponding data line 120, the drain D of the switching element T is electrically connected to the first electrode 330, and the gate G of the switching element T is electrically connected to the scan Signal. The switching element T may be plural, but is not limited thereto. In some embodiments, the third electrode 390 may be a controllable potential, such as a common potential, a floating potential, or other suitable potentials. Preferably, the third electrode 390 is a common potential and may be A voltage difference is formed between the electrode 330 or the second electrode 350.

In a direction perpendicular to the first substrate 110 (for example, the Z-axis direction), a part of the third electrode 390 (for example, a part of the second trunk 392 and / or the fourth trunk 396) may overlap the corresponding data line 120. A part of the third electrode 390 (for example, part of the second branch 394 and the fourth branch 398) may not overlap with the corresponding data line 120, but correspond to between two adjacent data lines 120, that is, the third electrode 390 is a part that overlaps the corresponding sub-pixel PX, and another part is disposed on the corresponding data line 120 and / or on the area covered by the corresponding black matrix (not labeled).

FIG. 4 is a top view of a display device 40 according to a comparative example of the present disclosure. FIG. 5 illustrates a top view of a display device 50 according to another comparative example of the present disclosure. FIG. 6 is a top view of a display device 60 according to another comparative example of the present disclosure.

Referring to FIG. 4, the display device 40 and the display device 10 have a similar structure. The difference is that the third electrode 490 is not a patterned electrode, but a block electrode (see the description of the foregoing embodiment). . The display device 40 includes a first electrode 430, a second electrode 450, and a third electrode 490. The first electrode 430 is located on the first substrate 110, the second electrode 450 is located on the first electrode 430, and the third electrode 490 is formed on the second substrate 115 between the display medium layer 160 and the second substrate 115. Wherein, the second electrode 450 only includes a trunk electrode 451 and a plurality of branch electrodes 452 respectively extending from both sides of the trunk electrode 451, and its projection shape is similar to a fish-bone shape.

Referring to FIG. 5, the display device 50 and the display device 20 have similar structures. The difference is that the third electrode 590 is not a patterned electrode, but a block electrode (see the description of the foregoing embodiment). . The display device 50 includes a first electrode 530, a second electrode 550, and a third electrode 590. The first electrode 530 is located on the first substrate 110, the second electrode 550 is located on the first electrode 530, and the third electrode 590 is formed on the second substrate 115 between the display medium layer 560 and the second substrate 115. Wherein, the second electrode 550 only includes a trunk electrode 551 and a plurality of branch electrodes 552 respectively extending from one side of the trunk electrode 551.

Referring to FIG. 6, the display device 60 and the display device 30 have similar structures. The difference is that the third electrode 690 is not a patterned electrode but a block electrode (see the description of the foregoing embodiment). . The display device 60 includes a first electrode 630, a second electrode 650, and a third electrode 690. The first electrode 630 is located on the first substrate 110, the second electrode 650 is located on the first electrode 630, and the third electrode 690 is formed on the second substrate 115 between the display medium layer 160 and the second substrate 115. The second electrode 650 only includes a first trunk electrode 651, a second trunk electrode 652, a plurality of first branch electrodes 653, and a plurality of second branch electrodes 654. The first branch electrode 653 extends from the first trunk electrode 651 to the second trunk electrode 652, the second branch electrode 654 extends from the second trunk electrode 652 to the first trunk electrode 651, and each of the second branch electrodes 654 and the corresponding first The branch electrode 653 is connected.

In an experimental example, the liquid crystal efficiency and liquid crystal response time of the display devices 10, 20, 30 according to the embodiment of the disclosure and the display devices 40, 50, 60 of the comparative example are compared at the same time. The experimental results are shown in the first table below.

Table I Experimental group LCD efficiency (unitless) LCD response time (ms) Comparative example Display device 40 15.07% 3.07 Display device 50 11.02% 3.08 Display device 60 11.8% 2.58 Examples Display device 10 38.04% 3.23 Display device 20 28.0% 3.2 Display device 30 17.71% 3.3

From the experimental results in Table 1, it can be seen that the display devices 10 to 30 according to the present disclosure have more excellent liquid crystal efficiency than the display devices 40 to 60 of the comparative example, and the liquid crystal efficiency of the display device 10 is particularly better than that of the display. The device 50 is increased by about 27%, compared with the display device 40 by about 23%, and the liquid crystal efficiency of the display device 30 is increased by about 5.91% compared with the display device 60. In addition, the display devices 10, 20, and 30 not only have improved liquid crystal efficiency, but also the liquid crystal reaction time is quite good. There is not much difference from the liquid crystal reaction time of the comparative example, and it will not increase the liquid crystal reaction time too much and affect the zero sensitivity of liquid crystal molecules. degree.

FIG. 7 illustrates a second electrode (for example, 150, 250, 350) and a third electrode (for example, 190, 290, 390) of a display device (for example, 10, 20, and 30) according to an embodiment of the disclosure. The relationship between the slope ratio of the side of the branch as a function of the liquid crystal reaction time and the liquid crystal efficiency. In FIG. 7, the X-axis represents the side slope (for example, m ₁₉₄ , m ₂₉₄ , m ₃₉₄ ) of the side (for example, S ₁₉₄ , S ₂₉₄ , S ₃₉₄ ) of the second branch (for example, ₁₉₄ , ₂₉₄ , ₃₉₄ ). ) For the side slope of the first branch (for example, ₁₅₄ , ₂₅₄ , ₃₅₄ ) (for example, S ₁₅₄ , S ₂₅₄ , S ₃₅₄ ), the side slope ratio of the side slope (for example, m ₁₅₄ , m ₂₅₄ , m ₃₅₄ ) (For example, (m ₁₉₄ / m ₁₅₄ ), (m ₂₉₄ / m ₂₅₄ ), (m ₃₉₄ / m ₃₅₄ ), no unit). The left side of the Y axis indicates the response time of the liquid crystal (in milliseconds (ms)). The right side of the Y axis indicates that the liquid crystal efficiency of the comparative example using the third electrode as a block electrode is 100%, and the relative liquid crystal efficiency percentage (no unit) according to the embodiment of the present disclosure. Please refer to FIGS. 1 to 3 and 7 at the same time, the side of the second branch (for example, ₁₉₄ , ₂₉₄ , ₃₉₄ ) in the display device (for example, 10, 20, and 30) (for example, S ₁₉₄ , S ₂₉₄ , and S ₃₉₄ ) (For example, m ₁₉₄ , m ₂₉₄ , m ₃₉₄ ) for the side slope of the first branch (for example, ₁₅₄ , ₂₅₄ , ₃₅₄ ) (for example, S ₁₅₄ , S ₂₅₄ , S ₃₅₄ ) M ₁₅₄ , m ₂₅₄ , m ₃₅₄ ) The side slope ratio (for example, (m ₁₉₄ / m ₁₅₄ ), (m ₂₉₄ / m ₂₅₄ ), (m ₃₉₄ / m ₃₅₄ )) is about -4 to 4 (Unitless), compared with the comparative example in which the third electrode is a block electrode (the liquid crystal efficiency is set to 100%), the liquid crystal efficiency is increased by at least about 30%, and the response time of the liquid crystal is No significant change (about 3 ms). Preferably, when the side slope ratio (for example, (m ₁₉₄ / m ₁₅₄ ), (m ₂₉₄ / m ₂₅₄ ), (m ₃₉₄ / m ₃₅₄ )) is between about -1 to 1 (no unit) Over time, the liquid crystal efficiency can be increased by about 90% compared to the comparative example where the third electrode is a block electrode (the liquid crystal efficiency is set to 100%), and the liquid crystal reaction time is still maintained in a good range.

FIG. 8 illustrates the second branch (for example, 194, 294, 394) of the third electrode (for example, 190, 290, 390) of the third electrode (for example, 10, 20, and 390) of the display device according to an embodiment of the disclosure The width ratio (for example, W ₁₄ , W ₂₄ , W ₃₄ ) and the width between two adjacent second branches (for example, D ₁₉₄ , D ₂₉₄ , D ₃₉₄ ) or the width ratio percentage (for example, is ((W ₁₄ / D ₁₉₄ ) * 100%), ((W ₂₄ / D ₂₉₄ ) * 100%), ((W ₃₄ / D ₃₉₄ ) * 100%)) vs. liquid crystal reaction time and liquid crystal efficiency. In FIG. 8, the X axis indicates the width (for example, W ₁₄ , W ₂₄ , and W ₃₄ ) of the second branch (for example, 194, 294, and 394) of the third electrode (for example, 190, 290, and 390) and adjacent The width ratio between two second branches (for example, D ₁₉₄ , D ₂₉₄ , D ₃₉₄ ) or the width ratio percentage (for example, ((W ₁₄ / D ₁₉₄ ) * 100%), ((W ₂₄ / D ₂₉₄ ) * 100%), ((W ₃₄ / D ₃₉₄ ) * 100%), no unit). The left side of the Y axis indicates the response time of the liquid crystal (in milliseconds (ms)). The right side of the Y axis indicates that the liquid crystal efficiency of the comparative example using the third electrode as a block electrode is 100%, and the relative liquid crystal efficiency percentage (no unit) according to the embodiment of the present disclosure. Please refer to FIGS. 1 to 3 and 8 at the same time. When the width ratio (for example, W ₁₄ / D ₁₉₄ , W ₂₄ / D ₂₉₄ , W ₃₄ / D ₃₉₄ ) is larger, the area of the third electrode is larger, and the liquid crystal efficiency is larger. Is getting lower and lower, and when the above width ratio is also called width ratio percentage (for example, ((W ₁₄ / D ₁₉₄ ) * 100%), ((W ₂₄ / D ₂₉₄ ) * 100%), ((W ₃₄ / D ₃₉₄ ) * 100%)) When it is not more than about 67%, its liquid crystal efficiency can still increase by about 30% compared to the comparative example where the third electrode is a block electrode (the liquid crystal efficiency is set to 100%). Liquid crystal efficiency. When the above width ratio or width ratio percentage (for example, ((W ₁₄ / D ₁₉₄ ) * 100%), ((W ₂₄ / D ₂₉₄ ) * 100%), ((W ₃₄ / D ₃₉₄ ) * 100%) )) The smaller the LCD response time is, the slower the LCD response time is. In order to consider maintaining a certain level of LCD response time (for example, about 3 ms), the width ratio or the width ratio percentage (for example, ((W ₁₄ / D ₁₉₄ ) * 100%), ((W ₂₄ / D ₂₉₄ ) * 100%), ((W ₃₄ / D ₃₉₄ ) * 100%)) settings are approximately 11% or more. Therefore, the above width ratio or width ratio percentage (for example, ((W ₁₄ / D ₁₉₄ ) * 100%), ((W ₂₄ / D ₂₉₄ ) * 100%), ((W ₃₄ / D ₃₉₄ ) * 100) %)) Can range from about 11% to 100%, preferably between about 11% to 67%.

FIG. 9 illustrates a gap length (e.g., 252) of a first trunk (e.g., 252) of a display device (e.g., 252) and a second branch (e.g., 294) according to an embodiment of the disclosure. The relationship between the length ratio of L ₂₉₄ ′) to the length of the first branch (for example, L ₂₅₄ ) (for example, L ₂₉₄ ′ / L ₂₅₄ ) with respect to the liquid crystal reaction time and the liquid crystal efficiency. In FIG. 9, the X axis represents the length of the gap (for example, L ₂₉₄ ′) between the side of the first trunk (for example, 252a) and the second branch (for example, 294) and the length of the first branch (for example, L ₂₉₄ ′). For example, the length ratio of L ₂₅₄ ) or the percentage of length ratio (for example, (L ₂₉₄ '/ L ₂₅₄ ) * 100%), no unit). The left side of the Y axis indicates the response time of the liquid crystal (in milliseconds (ms)). The right side of the Y axis indicates that the liquid crystal efficiency of the comparative example using the third electrode as a block electrode is 100%, and the relative liquid crystal efficiency percentage (no unit) according to the embodiment of the present disclosure. Please refer to Figures 2 and 9 at the same time. When the above length ratio or length ratio percentage (for example, (L ₂₉₄ '/ L ₂₅₄ ) * 100%) is larger, the liquid crystal efficiency is higher and the reaction time is slower, so In order to maintain a certain level of response time (about 3 ms), the length ratio (for example, L ₂₉₄ '/ L ₂₅₄ ) may be between about 0% and 24%. In addition, the gap length (for example, L ₂₉₄ ′) can be 0, and the aforementioned technical effects can still be achieved. Therefore, this embodiment can also be applied to the embodiment of FIG. 1A.

FIG. 10A is a schematic diagram illustrating a liquid crystal deflection of the display device 70 according to an embodiment of the disclosure. FIG. 10B is a schematic diagram illustrating a liquid crystal deflection of the display device 80 according to a comparative example of the present disclosure.

10A and 10B, the display device 70 has a structure similar to that of the display devices 10, 20, and 30. The first electrode 730 is a block electrode, and the second electrode 750 and the third electrode 790 are patterned electrodes. The display device 80 has a structure similar to that of the display devices 40, 50, and 60. The first electrode 830 and the third electrode 890 are block electrodes, and the second electrode 850 is a patterned electrode. Compared with the comparative example in which the third electrode 890 of the display device 80 is a block electrode, since the third electrode 790 of the display device 70 is a patterned electrode, its branched electrode can enhance an electric field in a horizontal direction (for example, an arrow (Pointing), which makes it easier for liquid crystal molecules to deflect towards a horizontal direction (such as the X direction), which has a better contribution to liquid crystal efficiency, improves the liquid crystal efficiency at the electrode edge, the display screen is brighter, and the liquid crystal reaction time does not increase. too much.

The at least one switching element T in the foregoing embodiment may correspond to one sub-pixel, but is not limited thereto. In other embodiments, multiple sub-pixels may correspond to and / or may be shared with at least one switching element T. The type of the switching element T in the foregoing embodiment may be a bottom gate type, a top gate type, a three-dimensional type, or other suitable types. The material of the semiconductor layer of the switching element T of the foregoing embodiment may be amorphous silicon, microcrystalline silicon, nanocrystalline silicon, polycrystalline silicon, single crystal silicon, oxide semiconductor material, carbon nanotube (rod), organic semiconductor material , Perovskite, or other suitable semiconducting conductor materials, or a combination or stack of the foregoing to one of the materials. The unit of length and width of the foregoing embodiment is micrometers, and the values of length and width do not limit the scope of the foregoing embodiment, but it must conform to the ratio or percentage ratio described in the foregoing embodiment to display the foregoing embodiment. The liquid crystal efficiency of the devices 10, 20, and 30 has a better contribution, so that the liquid crystal efficiency at the electrode edges is improved, the display screen is brighter, and the liquid crystal response time does not increase too much.

Since the display device of the present disclosure includes a third electrode having a branch, and the second branch of the third electrode corresponds to the first electrode between two adjacent first branches in a direction perpendicular to the first substrate, Compared with the comparative example in which the third electrode is a block electrode, it can generate a higher electric field in the horizontal direction, which makes the liquid crystal molecules easily deflect toward the horizontal direction. Therefore, the liquid crystal efficiency can be improved by this, and a reasonable liquid crystal can be maintained. Reaction time.

In summary, although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

10, 20, 30, 40, 50, 60, 70, 80‧‧‧ display devices

110‧‧‧first substrate

115‧‧‧second substrate

120‧‧‧ Data Line

130, 230, 330, 430, 530, 630, 730, 830‧‧‧ first electrode

140‧‧‧ Insulation

150, 250, 350, 450, 550, 650, 750, 850‧‧‧ second electrode

152, 252, 3532‧‧‧ First trunk

152a, 152b, 192a, 196a, 252a, 292a, 352a, 356a, 392a, 396a, S ₁₅₄ , S ₁₅₆ , S ₁₉₄ , S ₁₉₈ , S ₂₅₄ , S ₂₉₄ , S ₃₅₄ , S ₃₅₈ , S ₃₉₄ , S ₃₉₈ ‧ ‧Side

154, 254, 354‧‧‧ first branch

154a, 156a, 194a, 194b, 198a, 198b, 254a, 294a, 294b, 394a, 394b, 354a, 354b, 358a, 358b, 394a, 394b, 398a, 398b

156, 358‧‧‧th third branch

160‧‧‧Display media layer

170‧‧‧ Overlay

180‧‧‧color conversion layer

190, 290, 390, 490, 590, 690, 790, 890‧‧‧ third electrode

192, 292, 392‧‧‧ Second trunk

194, 294, 394‧‧‧ second branch

196, 356, 396‧‧‧ Third Trunk

198, 398‧‧‧‧ Fourth branch

199, 299, 399‧‧‧ Junction

A, A’‧‧‧ connection endpoint

D‧‧‧ Drain

D ₁₉₄ , D ₁₉₈ , D ₂₉₄ , D ₃₉₄ , D ₃₉₈ , W ₁₁ , W ₁₂ , W ₁₃ , W ₁₄ , W ₁₁ ′, W ₁₂ ′, W ₁₃ ′, W ₁₄ ′, W ₂₁ , W ₂₂ , W _{23, W 24, W 31,} W 32, W 33, W 34, W 31 ', W 32', W 33 ', W 34' ‧‧‧ width

G‧‧‧Gate

L ₁₅₄ , L ₁₅₆ , L ₁₉₄ , L ₁₉₈ , L ₂₅₄ , L ₂₉₄ , L ₂₉₄ ', L ₃₅₄ , L ₃₅₈ , L ₃₉₄ , L ₃₉₈ ‧‧‧ length

O‧‧‧ opening

PX‧‧‧ subpixel

S‧‧‧Source

T‧‧‧switching element

FIG. 1A illustrates a top view of a display device according to an embodiment of the disclosure. Fig. 1B shows a cross-sectional view of the A-A 'line in Fig. 1A. FIG. 2 is a top view of a display device according to another embodiment of the disclosure. FIG. 3 is a top view of a display device according to another embodiment of the disclosure. FIG. 4 is a top view of a display device according to a comparative example of the present disclosure. FIG. 5 illustrates a top view of a display device according to another comparative example of the present disclosure. FIG. 6 is a top view of a display device according to another comparative example of the present disclosure. FIG. 7 is a graph showing a relationship between a slope ratio of a side of a branch of a second electrode and a third electrode of a display device according to an embodiment of the disclosure with respect to a liquid crystal response time and a liquid crystal efficiency. FIG. 8 illustrates the relationship between the ratio of the width of the second branch of the third electrode of the display device and the width between the two adjacent second branches of the display device according to an embodiment of the disclosure with respect to the liquid crystal response time and the liquid crystal efficiency. FIG. 9 illustrates the relationship between the length ratio of the gap length between the side of the first trunk and the second branch of the display device and the length of the first branch of the display device according to an embodiment of the disclosure with respect to the liquid crystal response time and liquid crystal efficiency. FIG. 10A is a schematic diagram illustrating a liquid crystal deflection of a display device according to an embodiment of the disclosure. FIG. 10B is a schematic diagram illustrating a liquid crystal deflection of a display device according to a comparative example of the present disclosure.

Claims (20)

A display device includes: a first substrate; and a second substrate corresponding to the first substrate to accommodate a display medium layer, wherein the first substrate and the second substrate have a plurality of sub pixels, and At least one of the sub-pixels includes: a first electrode disposed on the first substrate, and the first electrode is a block electrode; 第二 a second electrode located on the first electrode, wherein the first electrode The two electrodes include a first trunk and a plurality of first branches, wherein one end of each of the first branches is connected to one side of the first trunk, and an extension direction of one of the first trunks is connected to one of the first branches. An extension direction is staggered; at least one insulating layer is disposed between the first electrode and the second electrode; 第三 a third electrode is disposed on the second substrate, wherein the third electrode includes a second trunk and a plurality of A second branch, in which one end of each of the second branches is connected to a side of the second trunk, and an extension direction of the second trunk is staggered with an extension direction of each of the second branches, In a direction perpendicular to the direction of the first substrate, any one of the second branches is located between two adjacent first branches; and at least one switching element is disposed on the first substrate, and the at least one The switching element is electrically connected to one of the first electrode and the second electrode as a pixel electrode, and the other of the first electrode and the second electrode serves as a common electrode. The display device according to item 1 of the scope of patent application, wherein the extension direction of each of the first branches is different from the extension direction of each of the second branches. The display device according to item 1 of the scope of patent application, wherein the extension direction of each of the first branches is the same as the extension direction of each of the second branches. The display device according to item 3 of the scope of patent application, wherein in a direction perpendicularly projected to the first substrate, the first trunk overlaps each of the second branch portions. The display device according to item 1 of the scope of patent application, wherein, in a direction perpendicular to the direction of the first substrate, a slope of a side of one of the second branches is related to one of the first branches closest to each other. One of the side slopes has a ratio of -4 to 4. The display device according to item 1 of the scope of patent application, wherein the width of one of the other ends of one of the second branches in a direction perpendicular to the direction of the first substrate is equal to that of two adjacent second branches. The ratio of the width of one of them is 11% to 67%. The display device according to item 1 of the scope of patent application, wherein, in a direction perpendicular to the direction of the first substrate, the length of any one of the first branches is greater than the side of the first trunk and the second The length of a gap between any of the branches. The display device according to item 7 of the scope of patent application, wherein the length of the gap between the side of the first trunk and any of the second branches is equal to the length of any of the first branches The ratio is 0% ~ 24%. The display device according to item 1 of the scope of patent application, wherein the width of any one of the first branches decreases toward the extension direction of any of the first branches and / or any of the second branches One of the widths decreases in the direction of extension of any of the second branches. The display device according to item 1 of the scope of patent application, wherein the width of any one of the first branches increases toward the extension direction of any one of the first branches and / or any one of the second branches One of the widths increases in the extending direction of any of the second branches. The display device according to item 1 of the scope of patent application, wherein the second electrode further includes a plurality of third branches, and the third electrode further includes a third trunk and a plurality of fourth branches, wherein the third branch One end is connected to the other side of the first trunk, one end of each of the fourth branches is connected to one of the sides of the third trunk, and the other end of each of the second branches is corresponding and connected to each of the fourth branches. The other end to form a junction. The display device according to item 11 of the scope of patent application, wherein, in a direction perpendicular to the direction of the first substrate, the first trunk is located between the second trunk and the third trunk, and the first trunk The direction of extension passes through these connections. The display device according to item 11 of the scope of patent application, wherein the width of any one of the third branches decreases toward the extension direction of any of the third branches and / or any of the fourth branches One of the widths decreases in the direction of extension of any of the fourth branches. The display device according to item 1 of the scope of patent application, wherein the second electrode further includes a third trunk and a plurality of third branches, and the third electrode includes a fourth trunk and a plurality of fourth branches, wherein, One end of each third branch is connected to one side of the third trunk, the other end of each first branch corresponds to and is connected to the other end of each third branch, and one end of each fourth branch is connected to the first One of the four trunks is lateral, and the other end of each of the second branches corresponds to and is connected to the other end of each of the fourth branches to form a connection. The display device according to item 14 of the scope of patent application, wherein, in a direction perpendicular to the direction of the first substrate, the first trunk and the third trunk are located between the second trunk and the fourth trunk, and the The extension direction of the first trunk and the extension direction of the third trunk do not pass through the connection points. The display device according to item 14 of the scope of patent application, wherein the width of any one of the third branches decreases toward the extension direction of any of the third branches and / or any of the fourth branches One of the widths increases toward the extension direction of any of the fourth branches. The display device according to item 11 or item 14 of the scope of patent application, wherein, in a direction perpendicular to the direction of the first substrate, one of the fourth branches has a slope of a side edge with respect to the nearest thirds. One of the branches has a side slope ratio of -4 to 4. The display device according to item 11 or item 14 of the scope of patent application, wherein, in a direction perpendicular to the direction of the first substrate, a width of one of the other ends of one of the fourth branches is equal to that of two adjacent ones. The width ratio of one of the fourth branches is 11% to 67%. The display device according to item 11 or item 14 of the scope of patent application, wherein, in a direction perpendicular to the direction of the first substrate, any one of the third branches is longer than the side of the first trunk and the side of the first trunk. A gap length between any of the third branches. The display device according to item 19 of the scope of patent application, wherein the ratio of the length to the gap length is 0% to 24%.